Scania BMU DTC 646 The measured value for the current sensor is outside the permitted range

BMU Battery Management Unit · Scania

Code 646 (decimal). Some diagnostic tools show it in hexadecimal as 0286.

In short

The current value from the propulsion battery is outside the permitted maximum value.

Applies to: BMU5

What does Scania BMU fault code 646 mean?

What causes Scania DTC 646?

How does the system react?

How to fix Scania BMU fault code 646?

Read the full explanation with Premium

Causes, system reaction, symptoms and step-by-step repair instructions for every fault code are available to Premium members.

  • Full explanations of every code and brand
  • Causes, symptoms and repair steps
  • New brands and codes included
Get Premium – 7,50 € / month I already have an account

Yearly plan: pay 10 months, get 12. Cancel at any time.

This information is for guidance only. Always follow the manufacturer workshop manual and safety procedures; if in doubt, contact an authorised workshop.

Code 646 in other Scania systems

Compare code 646 in every system →